CN102482848A

CN102482848A - Roll with adjustable shell, apparatus and method

Info

Publication number: CN102482848A
Application number: CN2010800375021A
Authority: CN
Inventors: 托米·科罗莱宁
Original assignee: Metso Paper Oy
Current assignee: Valmet Technologies Oy
Priority date: 2009-09-02
Filing date: 2010-09-01
Publication date: 2012-05-30
Anticipated expiration: 2030-09-01
Also published as: FI20095899A; DE112010003542T5; FI123283B; WO2011027030A1; CN102482848B; FI20095899A0

Abstract

A roll (1 ) comprising a stationary shaft (2) and a hollow shell (3) rotatably fitted onto the shaft, and longitudal sealings (8) and end sealings (9,10) are arranged between the shaft and the shell for forming a first pressure chamber (6) and a second pressure chamber (7), and the roll (1 ) is loadable by conveying a pressure medium into the first pressure chamber (6) and/or into the second pressure chamber (7) for adjusting deflection of the shell (3). The amount and the direction of the total load caused to the shell (3) from inside by the pressure medium is defined by the difference of the loads caused by the pressure in the first pressure chamber (6) and the pressure in the second pressure chamber (7), and the pressure medium is steam, and the roll (1) is heatable by conveying that steam into at least one of said pressure chambers (6,7). An apparatus (20,30,31,33) comprising a deflection compensated roll (1 ) according to any embodiment of the invention. A press section of a fiber web machine. A drying section of a fiber web machine. A method for using a roll (1).

Description

Roller, equipment and method with adjustable shell

Technical field

Roller that the present invention relates to use in the fiber web machine and band slewing with adjustable shell.The present invention be more particularly directed to (but being not exclusively) a kind of that can in the press section of paper machine and oven dry portion, use, be used for the migration roller (deflection compensated roll) that conducts heat to metal tape and/or paper, and relate to a kind of method of using the migration roller.

Background technology

In the migration dancer, shell can be rotatably set in the top of fixed axis, and this shell loads through pressure oil being transported in the balancing gate pit between axle and the shell, with the skew of the shell of corrector roll.Being used for the pair roller employed oil that pressurizes is used to heat dancer.The compensating offset dancer of processing is a trade mark with SymRoll, EcoNip and S-Roll for example.Patent document publication number US 5244448 has described a kind of compensating offset dancer.Dancer typically uses at a slow speed the paper machine in a narrow margin of actuating speed up to 1300m/min.

In some applications, as restrictive condition, oil loads dancer and has limited rotary speed.When rotary speed increased increasing because of the oily interior friction that causes of especially oily loading dancer, this roller need consume a large amount of driving power outputs.

When the development of paper machine makes that production upward requires to utilize wideer and paper machine comes papermaking faster; In the case except other conditions, do not expect to make the rotary speed of the unsteady migration roller that press section and oven dry portion with limiting processing speed use to be in the quick range of operation above 1300m/min.

Patent document publication number US 5725465 has described a kind of gas loaded type compensating offset dancer.

Patent document publication number WO 03064762 has described a kind of metal belt calender.The migration roller is used as the roller that is positioned at outside the recycle metal band, and/or is positioned at the roller of the pressed outside roller of recycle metal band.Particularly verified, for the edge and the Tension Difference between the intermediate point of the metal tape in the wide metal belt calender with speed difference compensates and challenging to the metal tape channeling conduct.Under the ValZone trade mark, produce metal belt calender.

Expectation finds a kind of effective method of cost more to replace traditional hot-rolling to come the metal tape of hot-pressing portion.

The external dimensions of the roller of oven dry portion is big and occupy many spaces.Proposed metal tape is used for oven dry portion as a kind of thermaltransmission mode.But do not find as yet drying cylinder can be used as the heat-transfer arrangement of metal tape widely.

When using the hot-rolling of periphery boring, cost raises, and the hot-rolling of periphery boring is difficult to make.

Summary of the invention

According to first scheme of the present invention, a kind of roller is provided, it comprises fixed axis and rotatably is assembled to the hollow shell on the axle, and longitudinal sealing spare and end seal; Longitudinal sealing spare and end seal are arranged between axle and the shell, to form first balancing gate pit and second balancing gate pit; And roller is through being transported to pressure medium in first balancing gate pit and/or in second balancing gate pit and can be loaded, with the skew of adjustment shell; And the load through causing because of the pressure in the pressure in first balancing gate pit and second balancing gate pit is poor, limits the value and the direction of the full payload that internally shell is caused by pressure medium; And pressure medium is a steam, and roller is through steam being transported at least one said balancing gate pit and can be heated.Preferably, steam is superheated steam.

According to alternative plan of the present invention, a kind of equipment is provided, it comprises according to arbitrary scheme of the present invention or the described migration roller of embodiment.

The axle of this roller can be a hollow, is preferably tubular axis (tube shaft).

The thickness of the shell of this roller can be 15mm to 50mm, is preferably 30mm.

Preferably, at least one longitudinal sealing spare comprises the shunting device that is used for steam.

Said equipment can comprise the annular metal band, and the adjustable shell of the skew of roller this annular metal band that is configured to recline is with the Tension Difference of the broad ways of compensation metal tape.

Preferably, in this equipment, the shell of roller be configured to recline metal tape or fiber web are with thermal steering to metal tape and/or fiber web.

This equipment can comprise the heatable migration roller as the band guide reel of annular metal band and at least one.

This equipment can belong to the oven dry portion of fiber web machine; In this oven dry portion, available at least one roller correspondingly replaces at least one drying cylinder, and the diameter of this roller can be basically less than the diameter of this drying cylinder.

According to third party's case of the present invention, a kind of press section of fiber web machine is provided, it comprises according to arbitrary scheme of the present invention or described roller of embodiment or equipment.

According to cubic case of the present invention, a kind of oven dry portion of fiber web machine is provided, it comprises according to arbitrary scheme of the present invention or described roller of embodiment or equipment.

According to the 5th scheme of the present invention, a kind of method of using roller is provided; This roller comprises fixed axis and rotatably is assembled to the hollow shell on the axle, and longitudinal sealing spare and end seal; Longitudinal sealing spare and end seal are arranged between axle and the shell, to form first balancing gate pit and second balancing gate pit; This method comprises through pressure medium is transported in first balancing gate pit and/or in second balancing gate pit comes loaded roll, with the skew of adjustment shell; And this method comprises through the load that causes because of the pressure in the pressure in first balancing gate pit and second balancing gate pit poorly, limits the value and the direction of the full payload that internally shell is caused by pressure medium; And steam is transported at least one said balancing gate pit as pressure medium, and come warm-up mill by steam.

Preferably, in the method, the shell of roller is arranged to recline the annular metal band with the guide wire band, and the skew of the shell of adjustment roller is with the Tension Difference of the broad ways of compensation ring-type metal tape.

The pressure differential of 8 crust can be set between first balancing gate pit of said roller and second balancing gate pit, can reach the linear load of 350kN/m thus by roller.The pressure differential of 2 crust also can be set between first balancing gate pit of roller and second balancing gate pit, can reach the linear load of 100kN/m thus by roller.

Said roller and/or equipment can be used for the for example different piece of the fiber web machine of paper machine, board machine and Paper pulp machine and so on.Can in a plurality of migration schemes, use said roller and/or equipment.This roller especially can use with metal tape.For the migration scheme, this roller is fit to use with metal tape, so that for example can compensate edge and the Tension Difference between the mid point and the speed difference of the wide metal tape that the skew because of roller causes especially, and can be with suitable manner guide wire band.In addition, can obtain to metal tape or the good and economic heat transmission of fiber web by said roller.The roller of the comparable periphery boring of this roller cost is more made effectively.Said roller and/or equipment can be used in press section and the oven dry portion, and are preferred for having in the calender of requirement low in calories.Said roller also can be used to replace drying cylinder.By migration, the diameter of the shell of said roller can be basically less than the diameter of current drying cylinder.In some cases, can under than the higher velocity conditions of current compensating offset roller, use said roller; In the case, in the process of making fiber web, there is not the speed restriction that causes because of the compensating offset roller.Other advantages will occur in following description and claim.

Different embodiments of the invention will be only related one or some schemes of the present invention illustrate or illustrate.The arbitrary embodiment that it will be understood by those skilled in the art that scheme of the present invention can be applicable to same approach of the present invention and other schemes separately or with other embodiment combinations.

Description of drawings

With reference to accompanying drawing, will the present invention be described through by way of example, in the accompanying drawing:

Fig. 1 illustrates the migration roller, its used vapour heating;

Fig. 2 illustrates the section A-A of the roller of Fig. 1 type at the end regions of roller;

Fig. 3 illustrates the roller of Fig. 1 type, and it is positioned at the outside of recycle metal band as the migration roller;

Fig. 4 to Fig. 7 illustrates the roller of Fig. 1 type some section B-B at the zone line of roller;

Fig. 8 and Fig. 9 illustrate the band guide reel of the roller of Fig. 1 type as the recycle metal band.

The specific embodiment

In the following description, identical numeral components identical.Accompanying drawing shown in should be understood that is not in full conformity with ratio, and accompanying drawing is mainly served the purpose of explaining embodiments of the invention.

Fig. 1 illustrates the side partial cross-sectional of the adjustable roller 1 of skew that floats, and the adjustable roller 1 of skew that floats comprises fixed axis 2 and rotatable shell 3.The end 2.1 of axle 2 supports to place the structure outside roller 1 with the mode that allows axle 2 and shell 3 to be crooked 5 shapes.The shell end 3.1 of shell 3 is arranged on the end bearing 4, and end bearing 4 is assemblied on the axle head 2.1.Shell 3 comprises shell surface 3.2, and shell surface 3.2 can be adjusted to the curvature of expectation.The migration motion 3 ' of roller 1 can be delivered to another processing member, for example pressure roller (nip roll) 12 or metal tape 11 of fiber web via shell surface 3.2.Shell 3 is crooked under the load effect that for example roller, band or fiber web caused, but because the distance between said inner surface and the outer surface, the inner surface 3.3 of shell is the outer surface of engagement shaft 2.2 not.

Migration roller 1 can be loaded and heats by superheated steam.Use roller 1 to allow to increase the rotary speed that can heat dancer, this is because when rotary speed increases, and the interior friction of the medium of heating and pressurization does not increase when using steam basically.Compare with the heatable dancer that fluid can load, roller 1 is more competitive because of its energy consumption (low).

Axle 2 comes to seal each other by longitudinal sealing spare 8 with shell 3, makes longitudinal sealing spare 8 between the inner surface 3.3 of the outer surface 2.3 of axle 2 and shell 3, limit first balancing gate pit 6 and second balancing gate pit 7.End seal 8 preferably is attached to axle 2 by means of the groove on the opposite side that is arranged on axle 2.End seal 8 allows shell 3 to be rotated motion and bending motion, and makes balancing

gate pit

6,7 keep suitable pressure-tight (pressure tight).First balancing gate pit 6 and second balancing gate pit 7 illustrate with hacures.First balancing gate pit and/or second balancing gate pit can be divided into local chamber, and each forms a series of chamber (not shown).

Roller 1 comprises end seal, and these end seals are positioned at the end regions 3.1 of shell 3; Come

sealing load chamber

6,7 by these end seals, make shell 3 to rotate and to squint.In the example of Fig. 1, all be formed with the end seal of first balancing gate pit 6 at the two ends of shell 3; Wherein first end seal 9 is assembled to the surface of the central part of axle 2, and second balancing gate pit 7 comprises the second end seal 10, and the second end seal 10 is corresponding to the first end seal 9 of first balancing gate pit 6.

End seal

9,10 can comprise the sealing that is placed in the groove, and these sealings constitute the end seal of

homogeneous.End seal

9,10 has the pressure-tight that cooperates with longitudinal sealing spare 8.

End seal

9,10 is around axle head 2.1 (axle head 2.1 is attached to the central part of axle 2).Sealing flange 11 is attached at the inboard of the bearing 4 of shell 3, and first end seal 9 abuts against sealing flange 11 with the second end seal 10 and has the pressure-tight cooperation.Sealing flange 11 has centre bore, and axle head 2.1 is fit to extend via this centre bore, allows to change the distance between axle 2 and the shell 3 thus.

In certain embodiments, longitudinal sealing spare 8 is had a mind to be arranged to leakage type.For example; If roller 1 is not heating crucial (heating critical); Then can the minimum stream that supply to another balancing gate pit of steam arrival in the balancing gate pit be arranged to controlled sealing leak stream (sealing leakage), in other words, be arranged to the bypass of seal.In the case, at least one longitudinal sealing spare 8 comprises the shunting device that is used for steam.Above-mentioned sealing leak stream can be arranged to arrive second balancing gate pit 7 from first balancing gate pit 6, or arrives first balancing gate pit 6 from second balancing gate pit 7.

Preferably, the leakage of

end seal

9,10 is prevented from, and makes condensed water and steam can not get into the lubricating oil of bearing 4.

When shell of revolution 3, the condensed water that is formed by vapor condensation plays the effect of the lubricant of

seal

8,9,10.

The main type of the feasible configurations of the

seal

8,9,10 of the above-mentioned adjustable roller 1 of unsteady skew is fricting strip (scraping article) and diaphragm seal (filmy sealing).The

fixing seal bar

8 or 9 or 10 that is assembled to roller 1 alternatively preferably is provided with load, with the tightness of guaranteeing to seal.The

fixing seal bar

8 or 9 or 10 that is assembled to roller 1 alternatively preferably is provided with the adjustment surplus, with the tightness of guaranteeing to seal.Alternatively dress be incorporated into roller 1 and the fixedly convex type sealing strip 8 that supports through pressure differential or 9 or 10 and the diaphragm seal structure that is assembled to roller 1 alternatively can fully be suitable for guaranteeing the tightness that seals.

Preferably, longitudinal sealing spare 8 comprises waterproof material with

end seal

9,10, so that no matter high temperature still has water all can keep the attribute of good seal, and can avoid the suction phenomenon that is harmful to.Absorb water in the seal and can cause water boiling and the leakage of hermetically-sealed construction in the seal.

In certain embodiments, the longitudinal sealing between first balancing gate pit 6 and second balancing gate pit 7 can comprise at least one longitudinal sealing spare 8, for example two parallel seals.In certain embodiments; A longitudinal sealing spare 8 is arranged between first balancing gate pit 6 and second balancing gate pit 7; This longitudinal sealing spare can comprise the seal of the direction of two

balancing gate pits

6,7, edge towards inner surface 3.3 formation of shell 3, for example seal lip (sealing lip).

Pressure reduction between first balancing gate pit 6 and second balancing gate pit 7 limits a direction, adjusts the skew of shell 3 in the direction by the pressure of pressure medium.Be adjusted to the steam pressure that is higher than fully in second balancing gate pit 7 if supply to the pressure of the steam in first balancing gate pit 6, then mesochite 3 is apart from the distance increase of axle 2 in the central area of roller 1, and perhaps shell 3 is bent upwards when roller 1 is in position shown in Figure 1.Pressure differential in the

balancing gate pit

6,7 is suitable for influencing a reaction force, this reaction force corresponding to the moving mass of the frictional force between shell 3 and the seal 8, shell 3 and since roller and/or fiber web and/or band contact and issuable power with shell 3.

Steam for example can supply in the roller 1 via first axle head, and for example leaves via second axle head.In roller 1, be provided with the device that is used to make in steam (this steam is as heatable pressure medium) the entering roller 1 and leaves roller 1 circulation.In the time of in the

balancing gate pit

6,7 within steam supplies to the shell 3 of roller 1, steam is forming condensed water when shell 3 conducts heat.Can collect condenses water from the inwall 3.3 of shell 3, longitudinal sealing spare 8 strikes off condensed water from these inwalls.Can in the balancing gate pit, remove condensed water by any known method.For example can draw or blow down condensed water by roller 1 outer pressure.Condensed water can be brought to outside the roller 1 along identical path or other paths, balancing gate pit with steam outflow roller.

Preferably, first balancing gate pit 6 of roller 1 and the interior pressure in second balancing gate pit 7 are maximum 10 crust, and this is corresponding to the common maximum pressure of industrial air pressure system.In some cases, for example when the balancing gate pit was carried out pressure test, the air pressure of available air pressure system replaced the pressure of steam under pressure.

In some cases, the pressure differential between first balancing gate pit 6 and second balancing gate pit 7 is 8 crust, can reach the for example linear load of 350kN/m by roller 1 thus.Under some varying sized situation, can reach the linear load of 100kN/m by the pressure differential of the crust of 2 between first balancing gate pit 6 and second balancing gate pit 7, this linear load is corresponding to the linear load that reaches by some soft calenders.Roller 1 can be applied in the migration scheme of recycle metal band highly beneficially.As an example described herein, the band tension force of a metal belt calender is about 100kN/m.

Fig. 2 illustrates roller 1 from end direction, and the section A-A among Fig. 1 especially is shown; Fig. 1 illustrates the longitudinal sealing spare 9,10 of balancing

gate pit

6,7, and these longitudinal sealing spares are positioned at the end regions of the shell 3 of roller 1.Can see that in Fig. 2 the central part between axle head 2.2 of axle 2 can be formed from tubes, the inner surface 2.3 of this pipe limits hollow space.By tubular construction, can save the material cost of axle 2, and can make axle 2 form lightweight.Also can in the inflow of steam and bleeder, utilize the inner space 2.3 of the pipe 2 of hollow type.

Shell 3 can be formed by steel such as stainless steel or resistant material.Shell 3 can be formed by two-phase stainless steel (Duplex-material) or two phase stainless steel LDX material (Duplex LDX-material).

Shell 3 can form extremely thinly, and for example about 30mm is thick, but makes shell 3 continue to contend with load and the plus load load of nip or tape loop for example of steam pressure.The thickness of the shell of the adjustable roller of unsteady skew is 50-100mm traditionally, and the present invention does not expect to be limited on this conventional thickness; On the contrary, the thickness of shell 3 can be little many, be 15-50mm for example, be preferably 30mm.

Fig. 3 illustrates the compensating offset and the heatable roller 1 of Fig. 1 type, and roller 1 is placed in outside the first metal tape equipment 30.Metal tape equipment 30 comprises annular metal band 11, and metal tape 11 is adapted under the simple scenario at band guide reel 13 outer via being with guide reel 13 circular flows.Metal tape 11 can be adapted at being with guide reel 13 inside and outside operations.Migration roller 1 is configured to constitute the heat treatment nip N1 of fiber web W; Fiber web W is brought in the metal tape equipment 30, be positioned on the surface of metal tape 11 by (metal tape 11 before migration roller 1 via 13 operations of band guide reel), and metal tape 11 is left at guide reel 13 places of this fiber web W after being positioned at nip N1.Can be provided in metal tape 11 inherent long nip press N1 places with the pressure roller shown in the chain-dotted line 12 and apply linear load to roller 1.

The curvature of the shell 3 of migration roller 1 can be adjusted as expected.Through the curvature of adjustment shell 3, can compensate Tension Difference and speed difference between the margin and center portion of metal tape, and with suitable manner guide wire band.Through the curvature of adjustment shell 3, can compensate the scrambling of the linear load that the skew because of roller 1,12 causes, and can the skew line be adjusted to the expectation form.Can realize well and economically conducting heat by roller 1 to fiber web.The roller of the comparable periphery boring of said roller cost is more made effectively.Said roller can be used in press section and the oven dry portion, and preferably is used in the calender of requirement low in calories.

Fig. 4 to Fig. 7 illustrates some section B-B of the central area that is arranged in roller 1 of migration roller 1.

Metal tape 11 is arranged on the outer surface 3.2 of shell 3 of roller shown in Figure 41.The part that is used to handle fiber web W of roller 1 and metal tape 11 constitution equipments 20.By roller 1, can realize well and economically conducting heat to metal tape and/or fiber web W, fiber web W is directed to the processing nip that is made up of shell 3 and the metal tape 11 between fiber web and shell.For heat transfer applications, the roller of roller 1 comparable periphery boring cost is more made effectively.Roller 1 can be used in press section and the oven dry portion, and is preferred in the calender of requirement low in calories.Roller 1 also can replace drying cylinder to use.By migration, the diameter of shell 3 that can make roller 1 is basically less than the diameter of current drying cylinder (the drying cylinder skew prevents by large diameter drying cylinder).By migration, can the shell 3 of roller 1 be adjusted to linear forms or desired curvature.In Fig. 4, axle 2 is formed by solid material, for example forms through moulding and machining axle steam passages (not shown) and the attachment point that is used for seal 8.

Fiber web W (for example paper web) is set on the outer surface 3.2 of shell 3 of roller shown in Figure 51.The part that is used to handle fiber web W of roller 1 constitution equipment 20.By roller 1, can realize good and economic heat transfer to fiber web W, fiber web W is directed on the outer surface 3.2 of shell of revolution 3 and advances.In addition, the band (not shown) that is used to strengthen conducting heat can place fiber web W, and this band can be the band that metal tape or other materials are processed.For heat transfer applications, the roller of roller 1 comparable periphery boring cost is more made effectively.Roller 1 can be used in press section and the oven dry portion, and is preferred in the calender of requirement low in calories.Roller 1 also can replace drying cylinder to use.By migration, the diameter of shell 3 that can make roller 1 is basically less than the diameter of current drying cylinder.Fig. 5 axis 2 is according to forming with Fig. 2 corresponding mode.

Fig. 6 and Fig. 7 illustrate the direction of operating of migration roller 1.In some cases, for example under permanent load, roller 1 also can be used for the different angle position of direction to that indicated in the drawings.For example, the band guide reel of tape loop 11 can be counted as the permanent load on the roller 1.In Fig. 6, the shell 3 of roller 1 is owing to the difference that vertically upwards pressure between first balancing gate pit 6 and second balancing gate pit 7 is loaded, so the height in pressure ratio second balancing gate pit 7 in first balancing gate pit 6.In Fig. 7; When metal tape 11 is reclining the tension force of shell 3 compressing fiber web W when being 100kN/m; Vertically downward pressure differential is loaded the shell 3 of roller 1 between first balancing gate pit 6 and second balancing gate pit 7 owing to having, therefore the height in pressure ratio first balancing gate pit 6 in second balancing gate pit 7.

Fig. 8 illustrates the adjustable and application heatable roller 1 of skew of Fig. 1 type, and in this used, roller 1 was placed in the second metal tape equipment 31 as band guide reel 1.Metal tape equipment 31 comprises annular metal band 11, metal tape 11 be fit to via band guide reel 13 and skew adjustable and heatable band guide reel and circular flow.Metal tape 11 can be adapted at the inboard and the outside of said

band guide reel

13,1 and advance.The migration roller of suitable quantity can be set, with Tension Difference and the speed difference between the margin and center point of compensation metal tape 11, and guiding and heating metal strip 11.Migration roller 1 for example can be by the mode shown in the figure, is set to per second of recycle metal band 11 (whenever at a distance from one) band guide reel.Metal tape equipment 31 comprises pressure roller 32; Pressure roller 32 and metal tape 11 are configured for heat treatment and/or the press. nips N1 of fiber web W.Fiber web W is by in metal tape equipment 31; Be positioned at (metal tape 11 is adjustable and heatable band guide reel 11 operations via skew before heat treatment and/or press. nips N1) on the surface of metal tape 11, and metal tape 11 is left at guide reel 13 places of fiber web W after being positioned at nip N1.With the skew shown in the chain-dotted line adjustable and heatable roller 1 can be provided in the metal tape 11 inherent long nip press N1 places pressure roller 32 that reclines.

Fig. 9 illustrates the adjustable and application heatable roller 1 of skew of the type of Fig. 8, and in this was used, roller 1 was placed in the tri-metallic strip equipment 33 as guide reel 1.These migration rollers 1 are set in the recycle metal band 11 as being positioned at pressure roller 32 migration and heatable band guide reel 1 before.The long nip press N1 place that can be provided in the metal tape 11 with the pressure roller shown in the chain-dotted line applies linear load to pressure roller 32.Fig. 8 and pressure roller 32 shown in Figure 9 can be hot-rollings.

The non-limiting example that some embodiments of the present invention are provided is more than described.Very clear to those skilled in the art, the invention is not restricted to the details of being showed, on the contrary, the present invention can implement with other equivalent way.

More than some characteristics among the disclosed embodiment can under the condition of not using other characteristics, advantageously find application.Therefore, describe more than that should to be considered to only be the explanation of principle of the present invention and be not limitation of the present invention.Therefore, scope of the present invention is only limited the claims of enclosing.

Claims

1. a roller (1) comprises fixed axis (2) and is assembled to the hollow shell (3) on the said axle revolvably, and longitudinal sealing spare (8) and end seal (9,10); Said longitudinal sealing spare (8) and said end seal (9,10) are arranged between said axle and the said shell to form first balancing gate pit (6) and second balancing gate pit (7); And said roller (1) through pressure medium is transported in said first balancing gate pit (6) and/or said second balancing gate pit (7) in and can be loaded; To adjust the skew of said shell (3); It is characterized in that; Load through causing because of the pressure in pressure in said first balancing gate pit (6) and said second balancing gate pit (7) is poor, limits the value and the direction of the full payload that internally said shell (3) is caused by said pressure medium; And said pressure medium is a steam, and said roller (1) can be heated through said steam being transported at least one said balancing gate pit (6,7).

2. roller according to claim 1 is characterized in that, said steam is superheated steam.

3. roller according to claim 1 and 2 is characterized in that, said axle (2) is a hollow, is preferably tubular axis.

4. according to each described roller in the claim 1 to 3, it is characterized in that, the thickness of said shell (3) be 15mm to 50mm, be preferably 30mm.

5. according to each described roller in the claim 1 to 4, it is characterized in that at least one longitudinal sealing spare (8) comprises the shunting device that is used for steam.

6. one kind comprises the equipment (20,30,31,33) according to each described migration roller (1) in the claim 1 to 5.

7. equipment according to claim 6 is characterized in that, said equipment (20,30,31,33) comprises annular metal band (11); The adjustable shell of skew (3) of said roller (1) said metal tape (11) setting that reclined is with the Tension Difference of the broad ways that compensates said metal tape (11).

8. according to claim 6 or 7 described equipment; It is characterized in that; In said equipment (20,30,31,33), the said shell (3) of said roller (1) said metal tape (11) or fiber web (W) setting that reclined is with guiding heat in said metal tape (11) and/or in the said fiber web (W).

9. according to each described equipment in the claim 6 to 8, it is characterized in that said equipment (31,33) comprises the migration roller (1) of annular metal band (11) and the conduct band guide reel that at least one can heat.

10. according to each described equipment in the claim 6 to 9, it is characterized in that said equipment (20) belongs to the oven dry portion of fiber web machine; In said oven dry portion, correspondingly replace at least one drying cylinder with at least one roller (1), and the diameter of said roller (1) is basically less than the diameter of said drying cylinder.

11. the press section of a fiber web machine comprises according to each described roller (1) in the claim 1 to 5 or according to each described equipment (20,30) in the claim 5 to 10.

12. the oven dry portion of a fiber web machine comprises according to each described roller (1) in the claim 1 to 5 or according to each described equipment (20,30) in the claim 5 to 10.

13. a method of using roller (1), said roller (1) comprise fixed axis (2) and are assembled to the hollow shell (3) on the said axle revolvably, and longitudinal sealing spare (8) and end seal (9,10); Said longitudinal sealing spare (8) and said end seal (9,10) are arranged between said axle and the said shell to form first balancing gate pit (6) and second balancing gate pit (7); Said method comprise through pressure medium is transported in said first balancing gate pit (6) and/or said second balancing gate pit (7) in load said roller (1); To adjust the skew of said shell (3); It is characterized in that; Load through causing because of the pressure in pressure in said first balancing gate pit (6) and said second balancing gate pit (7) is poor, limits the value and the direction of the full payload that internally said shell (3) is caused by said pressure medium; And steam is transported at least one said balancing gate pit (6,7) as said pressure medium, and heat said roller (1) by steam.